NATURE AND CAUSE OF HOG CHOLERA 



13 



in 5 per cent aqueous solution, when allowed to act 

 for an hour or more, has proved effective in killing 

 it. Following is a table prepared by the German 

 Imperial Board of Health laboratories, which fur- 

 nishes additional information relative to the effec- 

 tiveness of various disinfectants when used to kill 

 hog cholera virus. Most of the tests were made 

 by mixing 10 mils of the virus with an equal 

 quantity of aqueous dilution of the disinfectant. 



Dilution 

 applied 



Disinfectant 



Corrosive 



sublimate 



Corrosive 

 sublimate 



Corrosive 

 sublimate 



Carbolic 

 acid 



Carbolic 

 acid 



Carbolic 

 acid 



Carbolic 

 acid 



0.3 per cent solution 



0.5 per cent solution 



Result 



Serum filtrate not 

 killed in 8 days. 



Serum filtrate virus 

 not killed in 4 days. 



0.2 per cent solution Urine virus killed 

 in 15 minutes in 

 one trial. In another 

 trial not killed. 



0.5 per cent solution Serum filtrate virus 

 not killed in 8 days. 



1.0 per cent solution Serum filtrate virus 

 not killed in 4 days. 



3.0 per cent solution Failed to kill blood 

 virus in 8 days. 



2.5 per cent solution Failed to kill urine 

 virus in 15 minutes. 



